310 ORTMANN— THE ALLEGHENIAN DIVIDE. [April 1 8, 



In a tributary of the Licking, Fleming Creek at Pleasant Valley, 

 Nicholas Co., Ky., I found, aside from Anodonta grandis and Lamp- 

 silis luteola: 



15. Anodontoides ferussacianus (Lea) 



Although these two lists give by no means the complete faunas 

 of these rivers, they show clearly that they are practically identical 

 with the upper Ohio drainage in West Virginia and western Penn- 

 sylvania. All these species have occurred in our previous lists, with 

 one exception, the very last one, Anodontoides ferussacianus. This 

 is a western and northern species. Of the characteristic Tennessee 

 (and Cumberland) drainage fauna not a trace is seen in these rivers. 



It is unknown at present whether there is a point in the upper 

 parts of these rivers, where the fauna stops suddenly in an upstream 

 direction. My chief object in introducing here the faunas of these 

 rivers is to show that they cannot be separated from the general 

 Ohio fauna. 



VII. Fauna of Upper Tennessee River. 



We come now to the Tennessee River. It is well known that 

 this system contains an extremely rich fauna, with a large number 

 of peculiar types. It is not my object to go into detail here, and I 

 only want to bring out the contrast of this fauna to that of the upper 

 Ohio in general, and especially to that of upper New River. With 

 this in view, I collected (September, 1912) in the uppermost parts 

 of Hoist on and Clinch Rivers in Virginia. Of course, my collec- 

 tions are by no means complete, as is clearly shown by a comparison 

 with the list published for Holston River by Lewis ('71), which, 

 however, needs revision. But what I have found is sufficient for 

 the present purpose. 



List No. 16. 



Middle and North Fork Holston, in Smyth Co. 

 (Those marked * only in Middle Fork.) 



1. Fusconaia sp. ? 



2. Pleurobema (possibly 2 species) 



3. Pleurob-ema fassinans (Lea) 



